<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<p th:text="${msg}" style="color: red"></p>
<form th:action="@{/login}">
    <p>账号：<input type="text" name="username"></p>
    <p>密码：<input type="password" name="password"></p>
    <input type="submit">
</form>
</body>
</html>